干旱区生态环境知识资源中心(Arid): 近50年呼伦湖水系草地退化时空过程及成因分析

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	近50年呼伦湖水系草地退化时空过程及成因分析
其他题名	The Spatial and Temporal Process in Grassland Degradation and Causes in Hulun-Lake Basin in the Past 50 Years
	杨久春; 张树文
ISSN	1673-5021
出版年	2009
卷号	31 期号:3 页码:13-19
中文摘要	利用遥感影像和地形图提取得到呼伦湖水系20世纪50年代中期、80年代中期和2000年、2005年四期1:10万土地利用/覆被数据,然后在各期土地利用/覆被类型转换的基础上,以覆盖度和退化程度作为对生态环境质量影响的主要指标,确定呼伦湖水系草地退化类型指标包括覆盖度降低、沙化、盐碱化和开垦,并获得了草地退化时空过程数据集.进一步采用GIS空间分析、地统计分析和相关分析方法对呼伦湖水系草地退化时空过程和成因进行分析,结果表明:近50年来,草地退化以覆盖度降低最严重,其次为盐碱化;以中度和重度退化为主;80年代中期以来,在气候条件较适宜牧草生长的情况下,人口的急剧增长是该时期草地开垦的主要原因,而牲畜数量的大规模增加对草地退化产生直接影响.
英文摘要	Based on the land use/ cover change data in 1:100 000 scale obtained by remote sensing images and relief maps from the mid-1950s to 2005 in Hulun-Lake Basin, according to the land use/ cover transformation, the indexes of grassland degradation types in Hulun-Lake Basin, including coverage reduction, desertification, alkisalification and reclamation, were determined. The datasets of grassland degradation were obtained synchronously. Based on the methods of GIS spatial analysis, geostatistics, and correlation analysis, the spatial-temporal characteristics and causes were further analyzed. The results showed that the reduction of coverage in grassland degradation was the most serious in the recent 50 years, then was the alki-salification. And the medium degradation and heavy degradation was dominant. Under the conditions of appropriate climate which is suitable for grass growing since the mid-1980s, the rapid increase of population was the main cause of grassland reclamation, and the sharp increase of livestock aggravated a direct and negative impact on grassland.
中文关键词	草地退化 ; 遥感 ; 时空过程 ; 成因分析 ; 呼伦湖水系
英文关键词	Grassland degradation Remote sensing Spatial and temporal process Cause analysis Hulun-Lake basin
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:3626734
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/224485
作者单位	中国科学院东北地理与农业生态研究所, 长春, 吉林 130012, 中国
推荐引用方式 GB/T 7714	杨久春,张树文. 近50年呼伦湖水系草地退化时空过程及成因分析[J],2009,31(3):13-19.
APA	杨久春,&张树文.(2009).近50年呼伦湖水系草地退化时空过程及成因分析.,31(3),13-19.
MLA	杨久春,et al."近50年呼伦湖水系草地退化时空过程及成因分析".31.3(2009):13-19.

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